Excellent Wordpress plugin to detect mobile devices and redirect to the mobile site with Redirect count chart for different device. You can also choose whether or not to redirect tablets by enabling or disabling the check-box option. Also there are option for individual platform redirect like iPhone, Android, Windows Phone on WP Mobile Redirect Plus.

This plugin also gives you the ability to redirect back for viewing full version website. Place a link ?http://example.com/?main=true? in your mobile website for that.